- Oahu dock
*Rumex alcockii Rech.f.
*Rumex algeriensis Barratte & Murb.
*Rumex alpinus L. - alpine dock, monk's rhubarb
*Rumex altissimus Alph.Wood - pale dock, smooth dock, peach-leaf dock
*Rumex alveolatus Losinsk.
*Rumex amanus